This guide will help you connect and configure Telnyx VoIP as a voice Channel on respond.io. With Telnyx VoIP, you can make and receive traditional phone calls directly in the platform, enabling seamless voice conversations with customers.
Prerequisites
Before connecting Telnyx VoIP to respond.io, ensure the following:
1. A Valid Business Email
Youâll need a valid business email address to create your Telnyx sub-account. This email will be used to log in to the Telnyx portal and receive important updates.
2. Access to Payment Method
To activate your Telnyx account, you must set up a payment method and purchase a phone number from the Telnyx portal.
Telnyx Account Verification
To unlock the full functionality of your Telnyx sub-accountâincluding purchasing numbers, setting up voice capabilities, and enabling international callingâyou need to complete the Telnyx Account Verification process.
Identity Verification (eKYC)
Before purchasing numbers or submitting Level 2 requests, Telnyx requires users to complete identity verification (eKYC).
Youâll receive an email to verify your identity after logging in to the Telnyx portal.
To complete this, go to Account Settings > Verifications and click Start Identity Verification.
You will also receive an email notification to complete the KYC process in the Mission Control Portal.
â ď¸ If you havenât verified your identity, you will not be able to purchase numbers or proceed with Level 2 verification.
Level 1 Verification
Most users are automatically Level 1 verified after confirming their email. This allows you to:
Purchase local numbers in your country (after completing eKYC)
Set up voice capabilities (US & Canada only)
Navigate to Account Settings > Verifications in your Telnyx portal to check your verification status.
Level 2 Verification
To enable additional features such as international calling, apply for Level 2 Verification. Requirements include:
Your account must already be Level 1 verified
A payment method added to your account
The following company information:
Company name
Contact phone number
Full business address (including street, city, state, postal code, and country)
Once submitted, Telnyx may contact you via email to confirm use case details. Approval may take up to 48 hours. If your request is denied, reach out to support@telnyx.com for assistance.
â ď¸ Only organization owners can access the verification section. Sub-members will not be able to submit verification requests.
â ď¸ Important: After your account is approved for Level 2 Verification, you still need to manually configure your Outbound Voice Profile (OVP) in the Telnyx portal to whitelist the countries you want to call. If this step is skipped, you may encounter the error: 403 Dialed Number is not included in whitelisted countries D13
To configure your OVP:
Log in to the Telnyx portal
Go to Voice > Outbound Voice Profiles
Select or create a profile
Under Allowed Destinations, add the countries you want to call
Save your changes
You must assign this profile to your number to enable international calling.
Connecting Telnyx VoIP to respond.io
Personal Telnyx accounts are not supported. The integration works via sub-accounts managed under respond.io.
Follow these steps to connect your Telnyx VoIP channel:
Go to Settings > Channels.
Click Add Channel and select Telnyx VoIP.
Click Connect and enter your business email address.
Telnyx Sub-Account Creation:
A Telnyx sub-account is automatically created for you.
Youâll receive a password reset email from Telnyx.
Log in to the Telnyx portal and complete the following:
Verify your identity
Add a payment method
Purchase a phone number (local or international â international numbers may require submission of additional documents. See Telnyx documentation for details.)
Return to respond.io, select your purchased number, and confirm the connection.
â Once connected, you can start making and receiving calls using your Telnyx number in the respond.io Inbox.
Channel Configuration
After connecting your Telnyx VoIP Channel, you can manage settings by going to Settings > Channels > Telnyx > Manage.
Channel name
Customize the name for internal reference.
Number status
Only Active numbers can be used for calling. Inactive numbers will trigger an error when used.
Additional resources
Use the Go to Telnyx button to:
Purchase additional phone numbers
Manage account settings
Top up your balance
Testing
To ensure your Telnyx VoIP setup is working correctly:
Make an outbound call to a contact from the respond.io Inbox.
Use a separate device to call your Telnyx number and test inbound call handling.
Check call logs in the Inbox to confirm status, duration, and agent handling.
FAQ and Troubleshooting
Why canât I make a call?
Ensure your selected Telnyx number is Active. Inactive numbers cannot be used for calling.
Why canât I receive calls?
Verify that your Telnyx number is properly linked and that itâs active with balance.
How can I check my phone number status?
Log in to your Telnyx portal.
Navigate to Real Time Communication from the left-hand menu.
Go to Numbers > Manage Numbers.
Locate your phone number in the list â the Status column will indicate whether your number is Active, Inactive, or requires further action.
Only Active numbers can be used for calling in respond.io. If your number is not active, check your account verification and payment status, or contact Telnyx Support.
Why do I see the error â403 Dialed Number is not included in whitelisted countries D13â?
This error means your Telnyx account is not permitted to call the destination country. This can happen even if your account is Level 2 verified.
To resolve this:
Make sure your account is L2 verified
Log in to the Telnyx portal and navigate to Voice > Outbound Voice Profiles
Edit your profile and whitelist the countries you want to call under âAllowed Destinationsâ
Save your changes and retry the call
What happens if I delete the Channel?
The Telnyx Channel will be removed from your workspace. Contacts and past messages remain, but you wonât be able to make or receive calls via Telnyx.
Can I add more than one Telnyx account?
Each workspace can create up to three Telnyx sub-accounts. Once the limit is reached, you must select from existing ones.
Can trial users connect Telnyx?
No. Only subscribed workspaces can connect Telnyx VoIP channels.
Can I use Telnyx call forwarding on respond.io?
Currently, sub-accounts created in respond.io are unable to activate Telnyx call forwarding due to a technical limitation on the Telnyx platform. Attempting to enable this feature will result in an error. Interested in this feature? Upvote the request here.